The service may use tracking pixels, web beacons, browser fingerprinting, and/or device fingerprinting on users.
"We [..] may use automated means to collect [...] network or Internet protocol address and type of browser you are using (e.g., Chrome, Safari, Firefox, Internet Explorer), the type of operating system you are using, (e.g., Microsoft Windows or Mac OS), the name of your Internet service provider (e.g., Comcast, Verizon or AT&T) [...], device settings, browser settings, the web pages of the Services you have visited, Services visited before and after you visit a Service, the type of handheld or mobile device used to view the Service (e.g., iOS, Android), location information, and the content and advertisements you have accessed, seen, forwarded and/or clicked on."